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Description

Japan JIS G 4311 (2011), SUH 309 Specialsteel Heat-resisting steel bars and wire rods and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: SUH 309
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel SUH 309 Martensite JIS Japan Heat-resisting steel bars and wire rods

Chemical composition(mass fraction)(wt.%) of the SUH 309

C Si Mn P S Cr Ni Mo
0.35 -0.45 1.80 -2.50 ≤0.60 ≤0.03 ≤0.03 10.00 -12.00 ≤0.60 0.70 -1.30

Mechanical Properties of steel grade SUH 309

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
386 (≥) 671 (≥) 32 43 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 434

Physical Properties of steel grade SUH 309

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
12 - -     0.31 -  
387 599 - 24.3 112   -  
528 - 22 44.2   313 442

Heat Treatment of steel grade SUH 309

Heat treated : 1128°C - 1736°C

Technological Curves of steel grade SUH 309

Relevant standard of SUH 309

G 4311 (2011) Heat-resisting steel bars and wire rods G-4311-(2011).pdf

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